---
kind: "section"
citation: "40 C.F.R. § 174.556"
title: "40"
number: "174.556"
heading: "SpCas9 protein; exemption from the requirement of a tolerance."
url: "https://uscodex.org/cfr/40/174.556"
---

# §174.556. SpCas9 protein; exemption from the requirement of a tolerance.


An exemption from the requirement of a tolerance for residues of SpCas9 protein in or on the food and feed commodities of Citrus when used as a Plant-Incorporated Protectant in accordance with label directions and good agricultural practices.


## Notes

### Amendments

[90 FR 58170, Dec. 16, 2025]

### Authority

Authority: 7 U.S.C. 136-136y; 21 U.S.C. 321(q), 346a and 371.

### Source

Source: 66 FR 37814, July 19, 2001, unless otherwise noted.

### Amendments

[90 FR 58170, Dec. 16, 2025]